at first i looked at the achievement and thought that would impossible because i am on a single player world and i cant get multiplayer unless i buy nintendo online so i looked up a tutorialon how to do it in single player and all tutorials said to throw a diamond to a zombie and he will picking up and give you the achievment but when i tried no zombie would pick it up and i tried at least 50+ zombies none would pick it up i even tried a couple times with a dispenser dk if it is supposed to be like that but yeah